关键词: 小平面模型;散射模型;低仰角多路径;相关系数

Abstract:

To improve the tracking precision of low-angle radar,it is necessary to consider multi-path effect caused by reflection of the earth.In this paper,a new model of multi-path scattering considering surface roughness,masking effect and multiple scattering respectively is presented based on the facet model whose scattering coefficient is derived based on the Kirchhoff theory.Signals from various rough surfaces based on various wavelength are computed.The pertinence of direct and echo signals is analyzed.

Key words: facet model;scattering model;multi-path of low-angle;pertinence coefficient